US7772939B2 - Polarization transformation circuit - Google Patents

Polarization transformation circuit Download PDF

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Publication number
US7772939B2
US7772939B2 US11/902,007 US90200707A US7772939B2 US 7772939 B2 US7772939 B2 US 7772939B2 US 90200707 A US90200707 A US 90200707A US 7772939 B2 US7772939 B2 US 7772939B2
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Prior art keywords
waveguide
transformation circuit
polarization transformation
waveguides
polarization
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Expired - Fee Related
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US11/902,007
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US20080068274A1 (en
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Naotsugu Watanabe
Takayuki Oyama
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NEC Corp
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NEC Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/165—Auxiliary devices for rotating the plane of polarisation

Definitions

  • the present invention relates to a waveguide apparatus used for an antenna for transmitting and receiving microwave and milliwave signals, and more particularly, to a waveguide apparatus including a polarization transformation circuit for switching between a horizontally polarized wave and a vertically polarized wave in a linear polarized wave.
  • a polarization transformation circuit is used in order to connect plural waveguides.
  • This polarization transformation circuit is a circuit for performing an impedance matching between the output impedance of one waveguide and the input impedance of another waveguide connected to the waveguide.
  • a waveguide apparatus comprising waveguides 1001 , 1002 , and polarization transformation circuits 1003 , 1004 .
  • polarization transformation circuits 1003 , 1004 By polarization transformation circuits 1003 , 1004 , matching between output impedance of waveguide 1001 and input impedance of waveguide 1002 is performed.
  • waveguides 1001 and 1002 are disposed so that the vibration directions of polarized waves that passed through respective waveguides 1001 and 1002 are horizontal to each other, no impedance miss-matching between the output impedance of waveguide 1001 and the input impedance of waveguide 1002 occurs. Accordingly, in order to perform impedance matching between the output impedance of waveguide 1001 and the input impedance of waveguide 1002 , it is not necessary to rotate polarization transformation circuits 1003 , 1004 .
  • FIG. 2 similarly to the waveguide apparatus shown in FIG. 1 , there is illustrated a waveguide apparatus comprising waveguides 1001 , 1002 , and polarization transformation circuits 1003 , 1004 . Impedance matching between the output impedance of waveguide 1001 and the input impedance of waveguide 1002 is performed using polarization transformation circuits 1003 , 1004 .
  • waveguides 1001 and 1002 are disposed so that the vibration directions of polarized waves that passed through respective waveguides 1001 and 1002 that are perpendicular to each other, impedance miss-matching between the output impedance of waveguide 1001 and the input impedance of waveguide 1002 will occur.
  • An object of the present invention is to provide a waveguide apparatus capable of easily performing polarization switching.
  • the polarization transformation circuit is embedded within the second waveguide connected to the first waveguide in a state rotated relative to the second waveguide at an angle that is set, based on a reflection characteristic indicating a characteristic of a reflection coefficient with respect to a waveguide polarization frequency.
  • FIG. 1 is a view showing an example of a waveguide apparatus in the case where the vibration directions of input/output polarized waves of waveguides are horizontal to each other;
  • FIG. 2 is a view showing an example of a waveguide apparatus in the case where the vibration directions of input/output polarized waves of waveguides are perpendicular to each other;
  • FIG. 3 is a view showing an exemplary embodiment of a waveguide apparatus of the present invention in the case where the vibration directions of input/output polarized waves of waveguides are horizontal to each other;
  • FIG. 4 is a view showing another exemplary embodiment of the waveguide apparatus of the present invention in the case where the vibration directions of input/output polarized waves of the waveguides are perpendicular to each other;
  • FIG. 5 is a perspective view of the waveguide apparatus of the present invention shown in FIG. 3 when viewed from the direction of A;
  • FIG. 6 is a perspective view of the waveguide apparatus of the present invention shown in FIG. 4 when viewed from the direction of B;
  • FIG. 7 is a view showing the result in which the reflection characteristic of an electric field horizontally polarized wave in an exemplary embodiment shown in FIG. 3 is measured.
  • FIG. 8 is a view showing the result in which the reflection characteristic of an electric field vertically polarized wave in an exemplary embodiment shown in FIG. 4 is measured.
  • waveguide apparatus comprising waveguide 101 serving as a first waveguide, waveguide 102 serving as a second waveguide, and polarization transformation circuit 103 .
  • polarization transformation circuit 1021 is embedded within waveguide 102 .
  • waveguides 101 and 102 are disposed so that the vibration directions of polarized waves that passed through the respective waveguides are horizontal to each other, and respective waveguides 101 and 102 are connected through polarization transformation circuit 103 .
  • the waveguide apparatus which has a configuration similar to the FIG. 3 , and which comprises waveguide 101 serving as the first waveguide, waveguide 102 serving as the second waveguide, and polarization transformation circuit 103 .
  • polarization transformation circuit 1021 is embedded within waveguide 102 .
  • waveguides 101 and 102 are disposed so that the vibration directions of polarized waves that passed through respective waveguides 101 and 102 are perpendicular to each other, and the respective waveguides are connected through polarization transformation circuit 103 .
  • Polarization transformation circuit 1021 shown in FIGS. 3 and 4 is embedded within waveguide 102 in the state rotated in advance at a suitable angle where impedance matching between waveguides 101 and 102 can be performed only by rotating polarization transformation circuit 103 at a suitable angle.
  • the angle where polarization transformation circuit 1021 is rotated in advance is based on the reflection coefficients of waveguides 101 and 102 .
  • polarization transformation circuit 1021 is embedded within waveguide 102 in the state rotated in advance at a suitable angle, this is sufficient for performing impedance matching in an electric field horizontally polarized wave and in an electric field vertically polarized wave in order to only rotate polarization transformation circuit 103 .
  • the lengths of polarization transformation circuit 103 and polarization transformation circuit 1021 are set in advance to 1 ⁇ 4 of the waveguide wavelength.
  • the phase difference at reflection becomes equal to 180 degrees so that the reflection characteristic becomes satisfactory.
  • phase difference at reflection becomes equal to 180 degrees so that the reflection characteristic becomes satisfactory.
  • phase difference at reflection becomes equal to 180 degrees so that the reflection characteristic becomes satisfactory.
  • polarization transformation circuit 1021 is embedded within waveguide 102 in the state rotated at an angle ⁇ 1 relative to waveguide 101 , polarization transformation circuit 103 and waveguide 102 .
  • polarization transformation circuit 1021 is embedded in the state rotated at an angle of ⁇ 1 relative to waveguide 102 .
  • an angle that polarization transformation circuit 1021 and polarization transformation circuit 103 form is assumed to be ⁇ 2 .
  • polarization transformation circuit 103 is rotated at an angle ⁇ 3 relative to waveguide 101 .
  • respective angles ⁇ 1 to ⁇ 3 are set based on the reflection characteristic which will be described later.
  • ⁇ 1 about 26°
  • ⁇ 2 about 38°
  • ⁇ 3 about 26° are respectively optimum angles.
  • the reflection coefficient is below ⁇ 30 dB which is the target value in the present invention. From this result, it is seen that sufficient reflection characteristics can be obtained in the electric field horizontally polarized wave.
  • angle ⁇ 1 shown in FIG. 5 is set to about 26°.
  • the abscissa indicates the frequency (GHz) of the polarized wave
  • the ordinate indicates the reflection coefficient (dB).
  • angles ⁇ 1 , ⁇ 2 and ⁇ 3 shown in FIG. 6 are respectively set to about 26°, about 38° and about 26°.
  • the abscissa indicates the frequency (GHz) of the polarized wave
  • the ordinate indicates the reflection coefficient (dB).
  • the relative bandwidth which is the range for determining whether or not the reflection coefficient is suitable can be expanded depending upon the conditions such as the frequency used and the lengths of waveguides 101 , 102 , etc.
  • the above-described suitable angles also vary in accordance with such conditions. Namely, it is necessary to set, as an optimum angle, angles in which the reflection coefficient in the relative bandwidth that correspond to the use condition of the waveguide apparatus at that time is suitable.
  • polarization transformation circuit 1021 is embedded within waveguide 102 in the state rotated at an angle set, based on the reflection coefficient within the waveguide. For this reason, in the case where the vibration direction of a polarized wave that passed through waveguide 101 and the vibration direction of a polarized wave that passed through waveguide 102 are horizontal to each other, it is possible to perform impedance matching between waveguides 101 and 102 just by rotating polarization transformation circuit 103 by a suitable angle.
  • any other polarization transformation circuit may be disposed between waveguides 101 and 102 .
  • a polarization transformation circuit whose length is set to the length of 1 ⁇ 4 of each waveguide wavelength of waveguides 101 and 102 may be embedded within waveguide 102 , and the length of the other polarization transformation circuit may be set to 1 ⁇ 4 of each waveguide wavelength of waveguides 101 and 102 .
  • a polarization transformation circuit whose length is set to the length of 3 ⁇ 4 of each waveguide wavelength of waveguides 101 and 102 may be embedded within waveguide 102 , and the length of the other polarization transformation circuit may be set to 1 ⁇ 4 of each waveguide wavelength of waveguides 101 and 102 .
  • a polarization transformation circuit whose length is set to the length of 3 ⁇ 4 of each waveguide wavelength of waveguides 101 and 102 may be embedded within waveguide 102 , and the length of the other polarization transformation circuit may be set to 3 ⁇ 4 of each waveguide wavelength of waveguides 101 and 102 .

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  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Optical Integrated Circuits (AREA)
US11/902,007 2006-09-19 2007-09-18 Polarization transformation circuit Expired - Fee Related US7772939B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2006252679A JP4835850B2 (ja) 2006-09-19 2006-09-19 導波管装置
JP252679/2006 2006-09-19
JP2006-252679 2006-09-19

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US7772939B2 true US7772939B2 (en) 2010-08-10

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US (1) US7772939B2 (zh)
EP (1) EP1903630B1 (zh)
JP (1) JP4835850B2 (zh)
CN (1) CN101150214B (zh)
CA (1) CA2599668C (zh)
DE (1) DE602007008020D1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160285147A1 (en) * 2013-07-23 2016-09-29 Honeywell International Inc. Twist for connecting orthogonal waveguides in a single housing structure
US10547117B1 (en) 2017-12-05 2020-01-28 Unites States Of America As Represented By The Secretary Of The Air Force Millimeter wave, wideband, wide scan phased array architecture for radiating circular polarization at high power levels
US10840573B2 (en) 2017-12-05 2020-11-17 The United States Of America, As Represented By The Secretary Of The Air Force Linear-to-circular polarizers using cascaded sheet impedances and cascaded waveplates

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US8917149B2 (en) * 2011-03-22 2014-12-23 Sony Corporation Rotary joint for switchably rotating between a jointed and non-jointed state to provide for polarization rotation
EP2759020A4 (en) * 2011-09-22 2015-09-02 Zte Usa Inc DEVICE FOR CHANGING THE WAVEGUIDE ORIENTATION OF AN EXTERNAL MICROWAVE TRANSMITTING / RECEIVING ENCLOSURE
CN102496785B (zh) * 2011-12-28 2014-04-16 华为技术有限公司 用于微波室外传输系统的极化设备
CN102610876A (zh) * 2012-04-13 2012-07-25 江苏贝孚德通讯科技股份有限公司 可调式微波极化器
US8995800B2 (en) * 2012-07-06 2015-03-31 Teledyne Scientific & Imaging, Llc Method of fabricating silicon waveguides with embedded active circuitry
CN103326129B (zh) * 2013-06-26 2015-10-14 武汉凡谷电子技术股份有限公司 一种波导极化装置及其合路器
WO2015163033A1 (ja) * 2014-04-24 2015-10-29 日本電気株式会社 無線システム
CN106252811A (zh) * 2016-08-29 2016-12-21 成都赛纳为特科技有限公司 一种扭波导合并式斜扭耦合折叠波导
CN106159400A (zh) * 2016-08-29 2016-11-23 成都赛纳为特科技有限公司 一种扭波导分离式准平面折叠波导
CN106252812A (zh) * 2016-08-29 2016-12-21 成都赛纳为特科技有限公司 一种扭波导分离式斜扭耦合折叠波导
CN106329050A (zh) * 2016-08-29 2017-01-11 成都赛纳为特科技有限公司 一种扭波导合并式准平面折叠波导
CN106159403A (zh) * 2016-08-29 2016-11-23 成都赛纳为特科技有限公司 一种扭波导合并式斜扭耦合双脊矩形折叠波导
CN106207357A (zh) * 2016-08-29 2016-12-07 成都赛纳为特科技有限公司 一种扭波导分离式准平面脊波导折叠波导
CN106257745A (zh) * 2016-08-29 2016-12-28 成都赛纳为特科技有限公司 一种扭波导合并式斜扭耦合矩形折叠波导
CN106207356A (zh) * 2016-08-29 2016-12-07 成都赛纳为特科技有限公司 一种扭波导分离式斜扭耦合双脊矩形折叠波导
CN106252809A (zh) * 2016-08-29 2016-12-21 成都赛纳为特科技有限公司 一种扭波导分离式斜扭耦合矩形折叠波导
CN106159402A (zh) * 2016-08-29 2016-11-23 成都赛纳为特科技有限公司 一种扭波导合并式斜扭耦合单脊矩形折叠波导
CN106207358A (zh) * 2016-08-29 2016-12-07 成都赛纳为特科技有限公司 一种扭波导分离式斜扭耦合单脊矩形折叠波导
CN110828955A (zh) * 2019-10-25 2020-02-21 北京遥测技术研究所 一种e面转h面波导探针过渡结构
CN112770475B (zh) * 2020-12-30 2023-06-30 湖南华创医疗科技有限公司 功率可调的波导装置、包括其的加速器及其调节方法

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160285147A1 (en) * 2013-07-23 2016-09-29 Honeywell International Inc. Twist for connecting orthogonal waveguides in a single housing structure
US9812748B2 (en) * 2013-07-23 2017-11-07 Honeywell International Inc. Twist for connecting orthogonal waveguides in a single housing structure
US10547117B1 (en) 2017-12-05 2020-01-28 Unites States Of America As Represented By The Secretary Of The Air Force Millimeter wave, wideband, wide scan phased array architecture for radiating circular polarization at high power levels
US10840573B2 (en) 2017-12-05 2020-11-17 The United States Of America, As Represented By The Secretary Of The Air Force Linear-to-circular polarizers using cascaded sheet impedances and cascaded waveplates
US11211675B2 (en) 2017-12-05 2021-12-28 Government Of The United States, As Represented By The Secretary Of The Air Force Linear-to-circular polarizer antenna

Also Published As

Publication number Publication date
EP1903630B1 (en) 2010-07-28
EP1903630A1 (en) 2008-03-26
CA2599668C (en) 2013-11-12
US20080068274A1 (en) 2008-03-20
CN101150214B (zh) 2013-06-12
JP2008078743A (ja) 2008-04-03
CA2599668A1 (en) 2008-03-19
CN101150214A (zh) 2008-03-26
DE602007008020D1 (de) 2010-09-09
JP4835850B2 (ja) 2011-12-14

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